title: Primary carcinoid tumour with ossification masquerading as calyx stone in a horseshoe kidney.
abstract: A case of renal carcinoid tumour arising within a teratoma in a horseshoe kidney in a 23-year-old male is reported. The presenting symptom was abdominal pain, and bone tissue within the tumour was initially misinterpreted as a calyx stone, leading to unsuccessful attempts at extracorporeal shock-wave lithotripsia and percutaneous lithotripsia. This unusual tumour is over-represented in patients with horseshoe kidney and other congenital developmental renal defects.
authors.affiliation: Urology Division, University of Göteborg, Ostra Hospital, Sweden.
authors.forename: P
authors.initials: P
authors.lastname: Lodding
authors.forename: J
authors.initials: J
authors.lastname: Hugosson
authors.forename: G
authors.initials: G
authors.lastname: Hansson
mesh_terms: D000328:Adult; D017610:Calcium Compounds; D002276:Carcinoid Tumor / Q000150:complications* / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D007668:Kidney / Q000002:abnormalities*; D007680:Kidney Neoplasms / Q000150:complications* / Q000473:pathology; D008297:Male; D009999:Ossification, Heterotopic / Q000473:pathology*; D010087:Oxides; D013724:Teratoma / Q000473:pathology
chemical_list: D017610:Calcium Compounds; D010087:Oxides; C016538:lime